NDA Math Binomial Theorem

© examsiri.com
Question : 11 of 50
 
Marks: +1, -0
Consider the expansion of (1+x)n.
Let p,q,r and s be the coefficients of first, second, nth and (n+1) th terms respectively. What is (ps+qr) equal to?
[NDA-II 2021]
Go to Question: